<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>盒子阴影</title>
  <style>
    div {
      margin: 50px auto;
      width: 200px;
      height: 80px;
      background-color: orange;

      box-shadow: 2px 5px 10px 1px rgba(0, 0, 0, 0.5) inset;
    }
  </style>
</head>

<body>
  <div></div>
</body>

</html>